Device for inspecting blood circulation



Dec. 7, 1948.

W. RYAN DEVI [CE FOR INSPECTING BLOOD CIRCULATION 2 sheets-sheet 1 Filed June a; 1945 INVENTOR. I Ryan 3 W ATTORNEK Dec. 7, 1948. RYAN 2,455,810

DEVICE FOR INSPECTING BLOOD CIRCULATION Filed June 8, 1945 2 Sheets-Sheet 2 H q r (4 Z WD )0 D D I D 0 Ag k IV I U 01/};7 U

INVENTOR. Wi l Ham Ryan ATTORNEY.

Patented Dec. 7, 1948 I UNITED STAT DEVICE FOR INSPECTING BLOOD omcum'rron William Ryan, New York, N. Y. 3 Application June 3, 1945, serial No. 598,376

, 1 This invention relates to new and useful improvements in a device for inspecting blood in circulation. v

More specifically, the invention proposes the construction of a device for inspecting blood in circulation characterized by a pipe line having a transparent section and provided at its ends with needles adapted to be inserted into the blood vessels of .the human body for conveying blood .to the exterior of the body, permitting it to be conveniently inspected when passing through the transparent section.

, A further object of the invention proposes the provision of a pump in the pipe line for assisting the pump action of the heart in circulating the blood through the pipe line.-

Another object of the invention proposes the provision of a means for illuminating the transparent section of the pipe line so that the blood passing through the transparent section may be magnified and conveniently examined preferably by means of a microscope.

Still another object of the invention proposes the provision of a camera in connection with the transparent section for permitting the blood passing through the transparent section to be actually photographed for record purposes.

Still another object of the invention proposes the provision of a means for eliminating the possibility of inserting the discharge needle into the blood vessels of the human body prior to the insertion of the intake needle, to eliminate the possibility of the insertion of the discharge needle andthe pumping of air into the blood vessels of the human body.

Still another object of the invention proposes the-construction of a device for inspecting blood in circulation which is simple and durable and which may be manufactured and sold at a reasonable cost.

For further comprehension of the invention, and of the objects and advantages thereof, reference will be had to the following description and accompanying drawings, and to the appended claims in which the various novel features of the invention are more particularly set \forth.

In the accompanying drawing forming a material part of this disclosure:

Fig. 1 is a front elevational view of a device for inspecting blood in circulation and constructed in accordance with this invention.

I "Fig.- 2 is an enlarged partial vertical sectional view taken on the line 2-2 of Fig. 1.

i Fig". 3 is an enlarged Vertical sectional view of the pump used -for circulating the blood.

Fig. 4is an enlarged sectional view of the intake needle.

"Fig. 5'is an enlarged vertical sectional view of the discharge needle.

2 Claims. (01. 128- 395) r One end of the Fig.5 is a schematic wiring diagram of the dev1ce..

The device for inspecting blood in circulation, according to this invention, includes a table II) upon which a bracket I I is supported. A pipe line I2 is provided with a transparent section I3 which is supported in the bracket I I. This transparent section It is preferably a piece of glass or tubular plastic material which possesses a fine degree of transparency so as not to interfere with the inspection and examination of the blood passing therethrough. The remaining portion of the pipe line .I2is constructed of rubber or other similar materials. i pipeline I2 is provided with an intake needle I 4 and the other end with a discharge needle I5. I These needles I4 and I5 are adapted to be inserted into the blood vessels of the human body to circulate the blood of these vessels through the pipe I2 permitting. the inspection of the blood at the transparent section l3.

A pump I6 is provided in the pipe line I2 for assisting the heart of the body in circulating the blood. This pump I6 includes a hollow casing I1 which encloses an electric vibrator I8. The vibrator I8 has a projecting stem I 9 connected with 'aflexible diaphragm 20 projected across the hollow chamber 2I of the casing IT. The hollow chamber ZI forms a continuation of the pipe I2. The entrance to the hollow chamber 2I is provided with a one way inlet valve 22 and the exit from the hollow chamber 2I is provided with a oneway discharge valve 23. Thus as the diaphragm 20 is oscillated by the vibrator I8 it will cause the blood to be sucked into the chamber 2I through the one Way inlet valve 22 and discharge this blood through the one way discharge valvel23. The valves 22 and 23 cooperate to cause the blood to move in the direction of the arrows inFigs. 1 and 3 rom the intake needle I4 through the transparentsection I3 to the dischargeneedle Means is provided on the bracket I I (for illuminating the transparent section I3 of the pipe I2. Thismeans comprising a neon type electric light 24 supported on the back wall of the. bracket II so that the light will fall onto the transparent tube I3. A conventional adjustable microscope 25 is also supported upon the bracket I I adjacent the light 24 .for permitting the blood passing through the transparent section I3 to be conveniently inspected. On the opposite side of the light 24, the bracket II supports a camera 26 which may be used for photographing the blood passing through the transparent section I3. Further details of the construction of the microscope 25 andthe camera-26 will not be given in this specification as these details formno part section 28 which is tubular in nature and which is inserted into the end of the pipe line I2. This base section 28 is threadedly engaged by a fine tubular needle section 29 which is adapted to be inserted into the blood vessel at one side of the body. The discharge needle I5 is characterized by a base section 30. This base section 39 is constructed of plastic or other non-magnetic materials and is inserted into the opposite end of the pipe line I2. This base section 39 slidably supports a needle section 3| which is adapted to be inserted into the body for conveying the blood, taken out through the intake needle I4, back into the body. This needle 3| is provided with an internal shoulder 32 and an expansion spring 33 operates between the shoulder 32 and the opposite end of the base section 39 for urging the needle 3 I into a retracted position Within the base section 39. The needle 3| is constructed of metallic magnetic material.

Normally the needle section 29 of the intake needle I4 is extended, indicating that this needle should be first inserted into the blood vessel.

Electrically controlled means is provided and is adapted to be set in operation by the blood entering the intake needle I4 to extend the needle section 3| of the discharge needle I5 to permit it to be inserted in the blood vessel of the body. Having the needle section 3| of the discharge needle I5 retracted eliminates the possibility of inserting this discharge needle into the blood vessel of the body prior to the intake needle I4, to eliminate the possibility of circulating air in the blood vessel.

Fig. 6 illustrates a schematic wiring diagram of the device for controlling the extension of the needle portion 3| of the discharge needle I5. This means comprises a pair of spaced electric contacts 34 mounted upon a piece of non-conductive material 35 mounted on the interior of the base section 23 of. the intake needle I4.

These contacts 34 are mounted in a circuit 36 which includes'a dry cell 31, a master switch 38 and a relay 39. The blood upon entering the intake needle I4 will close the space between the contacts 34, completing the circuit 36 (if the master switch 38 is closed) to energize the coil 49 of the relay 39. Energizing the coil 40 will cause the switch M of the relay 39 to be closed. This switch 4| is mounted in a circuit 42 which includes a source of power (not shown on the drawing) and a solenoid 43 which is mounted upon the forward end of the base section 39 of the discharge needle I5. Energize.- tion of the circuit 42 upon closing the switch II of the relay 39 will cause the solenoid 43 to be energized. This will extend the needle section 3| of the discharge needle I5 against the action of the spring 33 as illustrated by the dot and dash lines 3| in Fig. 1. In this extended position this needle portion 3| may be inserted into a blood vessel. I

The operation of this device is as follows:

The pump I3 is set in operation and the intake needle I I is inserted into the blood vessel of a human body. The blood upon entering the needle I4 will close the contacts 34 and complete the circuit 36 to energize the relay 39. This relay 39 will then close the circuit 42 and energize the solenoid 43, immediately extending the needle portion 3| of the discharge needle permitting it also to be inserted in a blood vessel. The pump 4 I6 will continue operating to circulate the blood of the human body through the pipe line I2 from the intake needle I4 through the discharge needle I5.

With the blood circulating through the pipe line I2, the light 24 may be turned on to illuminate the transparent section I3 of the pipe line The microscope 25 may then be used to view the blood as it circulates through this transparent section and the camera 26 may be used to photograph the blood passing through the transparent section I3. At the close of the inspection period, the needles I4 and I5 are withdrawn from the blood vessels and the machine is stopped by shutting off the pump I6 and opening the master switch 38. The bracket II also supports atriangular sighting glass 50 which may be, used to view a larger area of the transparent section I3 of the pipe line I2.

While I have illustrated and described the preferred embodiments of my invention, it is to be understood that I do not limit myself to the precise constructions herein disclosed and the right is reserved to all changes and modifications coming within the scope of the invention as defined in the appended claims.

Having thus described my invention, what I claim as new, and desire to secure by United States Letters Patent, is:

1. In aninspecting device for blood in circulation, a pipe line having a transparent section, needles on the ends of said pipe line for insertion in the blood vessels of the human body, a pump in said pipe line for circulating the blood of the body through the pipe line, said needles being characterized by an intake needle and a discharge needle, and means for eliminating the possibility of inserting the discharge needle prior to the insertion of the intake needle, said means including an element normally'urging said discharge needle into an inoperative position, and solenoid means for activating said discharge needle into operative position when blood enters said intake needle.

'2. In an inspecting device for blood in circulation needles including an intake needle and a discharge needle for the flow of said blood and means for eliminating the possibility of inserting the discharge needle prior to the insertion of the intake needle, said means including an element normally'urging said discharge needle into an inoperative position and solenoid means for activating said discharge needle into operative position when blood enters said intake needle.

- WILLIAM RYAN.

REFERENCES CITED The following references are of record in the file of this patent: V

UNITED STATES PATENT Number Name Date 298,469 Hornig May 13, 1884 1,290,647 Nyvall Jan. 7, 1919 1,683,877 E'dblome Sept. 11, 1938 2,257,331 Clarke Sept. 30, 1941 2,308,516 Knott Jan. 19, 1943 2,357,238 Trimble Aug. 29, 1944 FOREIGN PATENTS Number Country Date.

492,770 Germany Mar. 5, 1930 

